﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal class SyncCachingDataSourceEnumerator : SyncDataSourceEnumerator, ICachingEnumerator
  {
    internal SyncCachingDataSourceEnumerator( DataSourceEnumeratorBase asyncEnumerator )
      : base( asyncEnumerator )
    {
      if( !( asyncEnumerator is ICachingEnumerator ) )
        throw new ArgumentException( "must implement ICachingEnumerator", "asyncEnumerator" );
    }

    #region ICachingEnumerator Members

    public int CacheSize
    {
      get
      {
        return ( ( ICachingEnumerator )this.ChildEnumerator ).CacheSize;
      }
    }

    public void SetCacheSize( int size )
    {
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size );
    }

    public void SetCacheSize( int size, double topTrimRatio )
    {
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size, topTrimRatio );
    }

    public void SetCacheSize( int size, SourcePosition topTrimLimit )
    {
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size, topTrimLimit );
    }

    #endregion
  }
}
